使用python3调用C语言的libWeWorkFinanceSdk_C.so，一直报错如下：

相关代码：

import base64
import ctypes
from ctypes import *
import json

from Crypto.Cipher import PKCS1_v1_5
from Crypto.PublicKey import RSA
class Slice_t(Structure):

    _fields_ = [
        ("buf",ctypes.c_char_p),
        ("len",ctypes.c_int),
    ]

class MediaData_t(Structure):
    _fields_ = [
        ("outindexbuf", ctypes.c_char_p),
        ("out_len", ctypes.c_int),
        ("data", ctypes.c_char_p),
        ("data_len", ctypes.c_int),
        ("is_finish", ctypes.c_int),
    ]

d = cdll.LoadLibrary('./libWeWorkFinanceSdk_C.so')
appid = 'wxxxxxxxxxxxb'
s = "dYf12xxxxxxxxxxxxxxxxxxxxxxxzzhpSYoJxx"
r= d.NewSdk()
NewDKey = d.Init(r,appid,s)

slice = Slice_t()
tes2 = d.GetChatData(r,0,100,"","",2,ctypes.byref(slice))


res = slice.buf
data = json.loads(res)
print(data)







{'errcode': 41001, 'errmsg': 'access_token missing, hint: [1620463281_108_313a28b8b986526a909584a121797653], from ip: 183.63.212.6, more info at https://open.work.weixin.qq.com/devtool/query?e=41001', 'chatdata'
# 已经确保corpid和secret是正确的。但是一直还是报错这个